Knife-grinder.



UNITED sTATEs PATENT oEEicE WILLIAM C.- STEWART, F LYNN, MASSACHUSETTS,ASSIGNOR, BY MESNE ASSIGN- MENTS, T0 UNITED SHOEl MACHINERY COMPANY, 0FPATERSON, NEW JERSEY, A.'

CQRPORATIQN 0F N JERSEY.

KNIFE-calunnia. l

Specication of Letters Patent.

Application led .Tune 17, 1909. SerialvNo'. 502,666.

To all whom t concern:

Be it known that I, WILLIAM C. STEWART, a subject of the King ofGreatBritain, re-

siding at Lynn, in the. county of Essex and State of Massachusetts, haveinvented. an Improvement inl Knife-Grinders, of'which the followingdescription, in connection with the accompanying drawings, is aspeciiica tion, like letters on the drawings representing like parts.

The invention to be herein described re-` j lates to means for grindingblades or knives,

the proper contour for the finished heel.-

The rounded or outer edge of the heel body is then suitably shaped toconform to the shape of the toplift, and the" breast of the heel isthenshaped by a blade or knife, the face of which conforms to the sha eof the heel breast and the edge of which 1s shaped to conform to theshoe shank. The breast of the heel is commonly conceived, althou l1 incertain types of shoes 1t is made straig t.

y The shoe shank is generally more or less convthe knife should conform.Thus, the or knife commonly employed in cutting or veX, and to thisconvex shapeA the edge of lade shaping the heel breast has a convex faceand a concave edge.

The aims and purposes of the present invention are to provide means forgrinding the above generally described character of heel breas'tingknife, and will best be understood from the following Vdescriptionandaccompanying drawingsA of one form -of means for carrying the inventioninto ef` feet, lit bein understood that the invention lis not restrictedto the details illustrated and described, but is definitely pointedout'by the claims.'

In the drawings: Fi re 1 is a sidev elevation of a machine em odying thepresent invention, the lower part of the supporting standard beingbroken awa Fig.r2 is a section on the'line 2 2 of Flg. 1; Fig. 3 is asection on the line 3 3 of Fig. 1; Fig. 4 is Patented Jan. 7, 1913.

a section on the line 4 -4 of Fig. 1; Fig. 5 v l is a detached detailview showing the pattern and coperating rollwhich determine the edgecontour grinding action; and Fig. 6 isa section on the line 6 6 of Fig.5.

-The machine frame 1,'Fig. 1, may be of 'anydesired or proper characterand is illustrated as comprising a column to the upper .portion of whichare secured the risers 2 providing suitable bearings 3 for the supportof the grinding wheel 4, having connected thereto a pulley 5 driven by abelt 6, or`

other means, from any suitable source of power. The grinding edge of thegrinding wheel 4'may be of appropriate form, the wheel itself beincharacter of grin ing material.

Secured to the column 1 is a bracketA 7, Figs. land 2, having suitableguideways for a knife carrier slide 8 which serves to `sustain anadjustable knife carrier and knife toward and from the grinding surfaceof the rinding wheel, as will hereinafter more lly appear. As one meansfor thus.. adusting or feeding the knife carrier and nife, the bracket 7has projecting from its lower portion an arm 9 having an interiorlyscrewthreaded lug 10 which is engaged by the screw-threaded portion ofan adjusting screwll passing through a suitable supportformed of anydesired ing bearing in an arm 12 projecting from the slide 8, saidadjusting screw having applied to its upper end a beveled pinion13 andbeing held in its bearings by suitable collars 14, 15, Fig. 2. Securedto a shaft 16 contained in a suitable bearing 17 furnished by, the arm12 is a beveled pinlon 18 operatively engaged with the pinion 13, a handwheel 19 being provided on the end of the shaftl16 for convenientlymanipulating said shaft and, throu h. the gear connection described,

to adjust t e slide 8. A

Projecting from the knifecarrier slide 8 is an arm 20, Figs. 1 and 2, onwhich'is pivotally mounted a knife carrier support 22,l

said support being pivotally connected to the arm 20|at 23, theconstruction being such that the knife carrier support 22 may, at

times, as will presentlyappear, be swung about its..pivotal support -23to enable the knife carrier or knife to be manipulated. To prevent suchswinging movement of the knife carrier support 22 under ordinary1 conditions of use the hub portion thereof adj acent the pivotal supportisprovided with a stop 24 adapted to engage the end 25 of a `pawl`26pivoted at 27 and having a handle furnishing a support for the lower endportion 34 of the knife carrier support, the construction being suchthat by the weight of the knife carrier support, it will normally restwith the end 34 on the head 32 of the adjusting screw 31, while the pawl26 .will lock the knife carrier support in such position. as indicatedin Fig. 2.

The grinding wheel or element and the blade or knife support are adaptedto'have a relative bodily traverse imparted thereto, and preferably thistraverse may be in a curved path or arc. As one embodiment of means tothese ends the present invention contemplates the followingconstruction, though obviously it may be variously changed. The knifecarrier support 22 is provided ,with a T-shaped slot in which is adjustably mounted the head 35 of a pivotal support. or bolt 36 passingthrough a suitable slot or opening 37 in an a-rm 38, havingscrew-threaded to its outer end a clamping nut 39, Figs. 1 and 3, saidarm 38 at its upper portion carrying the knife to be ground,

- in a manner as will presently appear. From the construction thus fardescribed it will be apparent that the arm 38 may be swung about thepivotal support or bolt 36 as a center to give to the knife edge itsconcave form, and that, by properly adjusting the support or bolt 36 inthe sl-ot 37 of the arm 38, the arc or swing of the knife carried bysaid arm.may be appropriately changed to suit the conveXity or curvatureof said knife. Disposed about the pivotal support or bolt 36 is alsleeve 40 having a head 41, Fig.f3, bea-ring against the face 42 of theknife carrier support 22, the opposite end portion 43 of said sleevebearing against the face of the clamping nut 39. Surrounding the sleeve40 j is the outer sleeve 44` having a head 45. bearing upon `one face ofthe arm 38 and having l screw-threaded to its opposite end a nut 46 awasher 47 being interposed# between the said nut and the other face ofthe arm 38,

the construction being such that when the4 clamp 39 and nut 46 areloosened, th'efpivfA otal support or bolt 36 and the sleeveslsurVrounding itmay be appropriately adjusted described adjusting operation,it is provided at its lower end with a locking bolt 48, Fig. 1, and ahand piece 49 mounted on the end of a stud 50 projecting through a slot51 in the arm 38, the construction being such-that the bolt 48 may beprojected and retracted. The outer portion of the lug 30 is providedwith a recess 52, Fig. 1, adapted t-o be engaged by the end of the bolt48 to hold the arm 38 in position during the described adjustment. Theupper portion of the arm 38 is provided with dovetail ribs 53 whichprovide suitable adjusting ways for a knife carrier, Figs. 1 and 4,whereby the knife carrier may be moved to position the knife edge withrespect to the grinding surface of the grinding wheel. The knifecarrier, which for identification may be referredto as a whole by A, isthus mounted upon the end ofthe swinging arm 38 so that the knifecarried thereby, may be presented to the grinding wheel while the arm 38is being swung about its pivotal support, previously adjusted intoproper position to accord with the curvature or conveXity of thebreasting I knife to be ground. .L y

The knife carrier Al is preferably'formed las a member 54 having theforward wing portions 55 which furnish ledges or supports 56 for theedge portions 57, Fig. 2, of the breasting knife 58, the edge portions57 of the breasting knife being held to their seats on the wing portions55 of the knife carrierbv suitable clamping screws 59, Figs.

'the breasting knife ismadetofconform to the-heel breast and the cuttingedge is concaved, as indicated at 61,Fig. l, to accord with the shape ofthe shoe shank. It thus `becomes desirable that, as the knife carrier isgiven its transverse, swinging movement relative to the grinding` Wheelby the arm 38 moving aboutl its pivotalsupport, the concaved edge 61 ofthe knife be properly prej sented to the grinding action of the ingWheel. As one means of securing this result the present inventioncontemplates moving thekni'fe carrier 4relative to the grinding wheel bymeans' of a p attern conforming to the shape of the cutting edge .G1

I ing' the breasting of the breasting knife, and as one form of means tothis end attention isdirected to Figs. 1, and 6. j

The rear portion 62 of the knife carrier is provided with suitable wingportions 63,- 63, similar to the wing portions 55 for supportknife, saidwing portions 63 being provided with bearing surfaces 64 for the edges 65 of a pattern 66, said pat tern being suitably clamped in adjustedposition by means of a set screw 67 threaded through the arm 62 of theicarrier, Figs 1,

, 5 and 6. The pattern ,66 thus comprises a plate adjustably secured tothe arm 5, conforming to the edge contour 61 of the breasting knife tobe ground.

Adjust-ably mounted on a bracket 69 `supported by an arm 7 0 carriedbythel bracket upon rotation of the adjusting screw 74 the slidel73carrying the pin 72-and roll 71 will be appropriately moved withrespect to the with relation to the edge 68 of the pattern 66.

leo

member 54 and slide 80 From the construction thus far described 'it willbe apparent that as the arm 38 is moved about its pivot-al support 36 togrind the faceof the knife, as indicated in Fig. 1,v

the operative may move the knife carriercontacts with the roll 71carried by the bracket 69, so that as the arm 38 is swung laterally totraverse theknife over the grinding wheel, the concaved edge 61 will beappropriately presented to the grindingaction of said wheel, as will bereadily understood.V

In order that thev clamp 39 and nut 46 -may be readily operated, theyare provided with the hand portions 78 and 79, respectively. Y

I t is sometimes desirable to grind a straight edge on a heel breastingknife, and

.in order to ada-pt the present construct-ion to that end the knifecarrier has interposed between its member 54 and the topiof the arm 38 atransverse sliding connection. In the presentv form ofthe invention thisvsliding connection isindicated in@ Figs. 1 and 4 as comprising atransverse slide 8O having dove-tailed portions 81, Fig. 1, engagingsuit-able ways in themember 54 of the knife carrier, a set screw 81*serving `to lock the 62, said plate having an edge contour 68, Figs. 1and together, and when Y i unclamped to permit the knife carrier mem-`ber 54 to be moved transversely, the construction being such that whenthe arm 38 is locked from swinging movement by means of the. bolt 48,and the set screw 81* un clamped, in a manner hereinbefore stated, theoperator can move the knife carrier transversely across the top of thearm 38, and thus grind the straight 'face portion while the .edge 61-may still be made to conform to the convexity of the shoe shank by asuitable pattern, in a manner hereinbefore stated. A

To facilitatethe ready adjustment of the pivotal support 36 for the arm38, said arm 38 is, provided with a scale 82, F ig.l l, co loperatingwith a pointer 83 movable with the pivotal support. or bolt 36.

As the knife carrier is swung about'its .pivotal support to grind theface thereof, it is desirable that it be not permitted to swing out ofoperative engagement with the grinding element or wheel 4, and tothisendsuitable stops 84 project from Teach side of the knife carriersupport 22 to'fengagethe knife carrier at each limit of its swingaboutits pivotalsupport 36. f i

As one form ofmeans for pxrop'erl 'positioning the cutting edge of-t ekie with relationI to the knife carrier, the latter is provided with aointer 85, Figs. 1 and 2, suitably held in p ace\ upon the knifecarrierby means of a set screw, as will be readilly;` f

understood, the construction being suc that, the pointer 85 beingadjusted in position to indicate the proper location of the cutting edgeof the knife with-relation tothe knife carrier in order thatit may beproperly presented to the grinding wheel, the knife 58 may be broughtinto proper Arelation therewith and as will bejreadily understood;

then clamped, l

In order t0 maintain the knife carrier i from movement longitudinallywith respect to the arm 38 when the parts are not in use and the carrieris not held to its work by the operator, the upper `portion of the armhas pivotally mounted thereon at 86 an arm?" 87in the end of which ismounted a locking pin 88I adapted to engage with an aperture 89 in theknife carrier, the construction being sucht-hat when the arm 87 isthrown upward" to bring the locking in 88 into position in engagementwith t e aperture 89 inthe knife carrier,.said knife carrier'l is heldfrom longitudinalv movement on the arm 38. That the locking pin-@88 ma lmove into and out vof position, t ere 1s a guide or belt 90 leadingfromthe aperture 89 on which the end of the in 88 may rest as'it moves intoand out of ocking relation with the aperture-89. f h

Should it be desirable at `Aany time access tothe knife lor carrier, as,for mst-ance, in taking out one knife and replacing f to have,

readily it by another, the knife carrier support 22 may be swung aboutits pivotal mounting 23 by simply-tripping the pawl 26 from engagementwith the lug 24, Fig. 2, and after the knife has been properlypositioned in its carrier the knife carrier support may be swung back toits operative position, as indicated in Fig. 2.

Obviously many changes may bemade iny the details and general form andrelation of many of the parts, it being understood that the invention isnot restricted thereto but is definitely pointed out by the claims.

What is claimed is:

1. In a breaster knife grinding machine, the combination of sharpeningmeans, a blade or knife support, means for pivotally sustaining saidsupport that. the blade or knife may be swung bodily in an arc relativeto the sharpening means, means for changing the radius of arc movement.to vary the curvature of the arc in which the blade or knife swings,and a pattern to bodily vary the position of the blade orl knife in thesame arc as it is swung therein. 2. In a breaster knife grindingmachine,

thecombination of a grinding wheel, a blade y carrier, means permittingbodily traverse to said bla'de carrier lin a curved path to present thecurved face of the breaster knife to the action of the grinding wheel,and a pattern Y to the action of the grinding wheel, means for varyingthe curvature of the curved path of carrier movement, and a pattern tobodily vary the position of-the blade in the Same path as the said bladeswings through said curved path'.

4. Ina blade sharpening machine, the.

combination of a sharpening means, a blade carrier, said sharpeningmeans and blade carrier having capacity forrelative traverse, connectedmeans permitting said traverse to be effected in a curved path orr'aright line -at will, and a pattern to bodily vary the position of theblade in Vthe prescribed path of relative traverse.

5. In a blade sharpening machine, the combination of a grinding wheel, ablade carrier, means to vimpart bodily traverse to said blade carrier ina curved path extend- -ing about the grinding wheel to present thecurved face of the blade to the'action of the said grinding wheel, stopsfor limiting the traversing movement, and a pattern to de- .fine thegrinding action` along the edge' of the knife during the said traverseof' the blade carrier.

6. In a knife grinding machine, the coinbination of a grinding element,a knife carrier, a knife carrier support to which the knife carrier ispivotally connected at a point which is the center of the curve of theknife to be ground to enable the knife carrier to be traversed in acurved path to grind the concaved face ofthe knife, and means forpivotally sustaining the knife carrier support to enable the knifecarrier to be swung out of operative relation with the grinding element.Y 1

7.V In a knife grinding machine, the combination of a grinding element,a knife carrier, va knife carrier support to which the knife carrier ispivotally connected to enable the knife carrier to be traversed in a-curved path to grind the face of the knife,

means for pivotally sustaining the knife carrier support toi enable theknife oarrier to be swung out of operative relation with thegrindingelement, and means for locking the knife carrier support in operativeposition.

8. In a knife grinding machine, the combination of a grinding element, aknife carrier, a knife carrier support to which the knife carrier ispivotally connected to enable the knife carrier to be traversed vin acurved path to grind the face of the knife, a pattern to determine thegrinding action ofthe knife edge, and means including a, lock forpivotally sustaining the knife carrier support to enable the knifecarrier to be swung out of operative relation with the grinding element.

9. In a knife grinding machine, the Icombination of a grinding element,a knife carrier, a pivotally mounted slotted armon which the knifecarrier is sustained, and means for adjustably securing the slotted armin position to permit the knife carrier and grinding element to be'traversed in a curved path of variable radius.

l0. In a knife grinding machine, the combination of a grinding element,a knife carrier, a pivotally mounted Aslotted arm on which the lmifecarrier is sustained, means for adjustably securing the Vslotted arm inposition to permit'the knife carrier and grinding element to betraversed in a curved path of variable radius, and a pattern to projectthe knife carrier with respect tothe grinding element during' the saidtraverse movement.

11..In a knife grinding machine, the lcombination of av-frame, agrinding element, a

knife carrier pivotally mounted to be travlersed 1n a curved path withrelation to the y grinding element to grind the face of a knife, meansfor varying lthe curvature of the transversefmoveinent, means foradjustedge of the knife toward and from the grinding element, and apattern and coacting-part, one connected to the knife carrier ing theknife carrier bodily to carry the and the other to the frame for bodilymovl--` of the knife carrier to grind the face of a v knife, saidcarrier having Wing portions to -support the side edges of the knife,and

' clamping means to hold the knife on said wing portions.

13. In a knife grinding machine. the Vcombination of a frame, a grindingelement,

a knife carrier pivotally mounted to be traversed in a curved path aboutythe grinding' element to grind the face of a knife, said carrier havingWing portions to support theside edges of the knife, clamping means tohold the knife. on said Wing portions, and a gage to determine thegrinding location of the knife edge.

14. In a knife grinding machine, the combination of a frame, .a grindingelement, a knife carrier pivotally mounted to be traversed in -a curvedpath With relation to the grinding element to grind the face of a knife,means slidally connecting the knife carrier to its support, Iand a -locknormally acting to prevent such slidingmovement to maintain the carrierin position on its support during periods of rest.

15. In a machine for lgrinding the heel breasting knives of boot andshoe machines, the combination of a grinding wheel, a` knife carriermovable transversely with relation to the peripheral surface of thegrinding Wheel, a pattern to move the knife longitudinally as thecarrier is traversed in its prescribed path transversely of the grindingwheel, and means for permitting said traverse to be effected in a curvedpath or a straight line at the will of the operator.

16. In a machine for grinding the heel breasting knives of boot and shoemachines, the combination of a grinding Wheel, aknife carrier mounted tomove in a curved path extending transversely of the grinding Wheel, andadjusting means for varying the curvature of the path of transverse`movement to accommodate knives. of varying contours. v

'breasting knives of boot and shoe machines,

path extending about the grinding Wheel,

means forl moving the carrier in a curved said means from mechanismpermitting movementof the 95 17. In a machine forigrinding :the lheelthecombination of a grinding wheel, a knife' carrier mounted to move in acurved path eX tending transverselyof the grindin wheel, means forvarying the curvature of t e path of transverse movement to accommodateknives of varying contours, Aand means for moving the knife carrierandknife in a direction longitudinally of the knife in the path of andduring such transversemovement.

18.' `In a machine for grinding the heel `breastingknives of boot andshoe machines,

the combination of a grinding Wheel, a knife carrier for presenting theconcaved ed e of the knife to the grinding Wheel, said ife carrier beingpivotally mounted on an axis disposed at the concaved side o f the knifeto cause the knife to be traversed 'in a curved and automatic means formoving the knife longitudinally as it is being traversed. 19. In amachine of the character. described, the combination of a rindingelement, Va knife carrier, pivo-ta ly mounted path about the grindingelement, devices for locking said means from pivotal movement, andmechanism permitting movement of the knife carrier in a lright linetransversely of the grinding element when said means is locked frompivotal movement.

20. In a machine of the character described, the combination ofagrinding element, a knife carrier, pivotally mounted means for movingthe carrier in a curved path about the grinding element, a carrier slidefor supporting said means in varying positions of adjustment, devicesfor lockingv pivotal movement, an

knife carrier inv a right line transversely ofl f the grinding elementWhen said means is locked from pivotal movement. In testimony whereof, Ihave signed my name to this specification, in the presence-of 100., .Ytwo subscribing witnesses.

WILLrnM C. STEWART.v

W'itnesses: t

REDFmLD H.' ALLEN, RosWELL F. HATCH.

